Large radio telescope dish with five towers around it, surrounded by forest.

China’s huge FAST telescope to open to international observers

FAST’s 500-meter (1,640-foot) dish makes it the world’s largest single-dish radio observatory. It’s expected to open to international observers in 2021.

A view from a rocket heading upward, looking down on Earth and a stack of satellites.

SpaceX’s 1st Starlink launch of 2021 went off without a hitch Wednesday

SpaceX launched 60 more of its Starlink satellites on January 20, 2021. SpaceX ultimately intends to launch tens of thousands of these satellites, to provide global internet access. Here’s why astronomers are concerned.

Check out these new Sun Science stamps!

The US Postal Service announced that they’ll be releasing a series of stamps highlighting images of the sun captured by NASA’s Solar Dynamics Observatory.

6 space missions to look forward to in 2021

Here are some of the space missions to keep an eye out for in 2021.

New study finds polyester fibers throughout the Arctic Ocean

A new study has found that pollution from microplastics is widespread in the Arctic Ocean, and 92% of those particles are minuscule synthetic fibers from our clothes.

Swirling green aurora in Alaska.

The myths behind the southern and northern lights

For millennia, humans have viewed the northern and southern lights – aurora borealis and aurora australis – and created myths and folklore to explain the dancing lights they saw in the sky.

Record number of billion-dollar disasters in U.S. in 2020

Last year, the U.S. experienced a record-smashing 22 weather and climate disasters that killed at least 262 people and injured scores more. Damages exceeded $1 billion each and totaled approximately $95 billion for all 22 events.

Spacesuited astronauts, next to lunar rover, on stark lunar surface, with Earth in the sky.

How will the U.S. space program fare under Joe Biden?

Joe Biden is the United States presidential election winner, but his plans for NASA remain unclear. And while citizens digest the election results, the space industry is left wondering what comes next.

When will the Age of Aquarius begin?

Astronomers and astrologers may agree that the Age of Aquarius starts when the vernal equinox point moves out of constellation Pisces and into Aquarius. But when will that be? There’s no definitive answer.

Ancient Maya civilization used advanced water treatment technology

The oldest known example of a water treatment system in the Western Hemisphere was recently discovered in Guatemala.

Isaac Newton.

Happy birthday to Isaac Newton

Isaac Newton, born on January 4, 1643, discovered the laws of motion and other principles that laid the foundation of physics and astronomy.

220 years ago today: 1st asteroid discovered

Giuseppe Piazzi discovered the asteroid Ceres – now considered a dwarf planet – on January 1, 1801.

Why does the New Year begin on January 1?

Where does the New Year’s Day concept come from?

The sky in 2020

A collection of astronomical photos of 2020 from southern British Columbia, Canada. The music is ‘Windswept’ by Kevin Macleod.

Sun’s entry into zodiac signs, 2021

Every year, at the December solstice, the sun enters the sign Capricorn. One month later, on January 19, 2021, the sun will enter the sign Aquarius. Look here for the dates for the sun’s entry into each sign of the zodiac for the year 2021.

No leap second for December 31, 2020

World timekeepers have decreed there will be no leap second on December 31, 2020.

Famous Earthrise photo taken on Christmas Eve

A Christmas Eve photograph showed humans their home world from a whole new perspective. This is the photo that’s said to have launched the environmental movement. It’s “Earthrise,” the iconic photo taken by astronaut William Anders on the 4th orbit of the moon aboard Apollo 8 on December 24, 1968.

New strain of Covid-19 explained

A new strain of the virus that causes Covid-19 appears to be spreading fast in the the UK. Why it matters that the coronavirus is changing, and what it means for vaccine effectiveness.

Personal solstices

Photos from EarthSky community members around the world, showing what the December solstice – bringing winter to half of Earth, and summer to the other half – means to them. Thanks to all of you for sharing these evocative images with us!

Jupiter and Saturn, annotated, above holidays lights.

Will Jupiter and Saturn appear as one star in 2020?

Jupiter and Saturn – the 2 biggest planets in our solar system – are very close together on December 21. Will they look like one star? Some answers here. Plus, possible astronomical explanations for the Star of Bethlehem or Christmas star.